[turbofan] Add proper conversion operators for int32<->int64.

test/compiler-unittests/change-lowering-unittest.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/compiler/typer.h"
 #include "test/compiler-unittests/graph-unittest.h"
@@ skipping 277 matching lines @@
 };
 
 
 TARGET_TEST_F(ChangeLowering64Test, ChangeInt32ToTagged) {
   Node* val = Parameter(0);
   Node* node = graph()->NewNode(simplified()->ChangeInt32ToTagged(), val);
   Reduction reduction = Reduce(node);
   ASSERT_TRUE(reduction.Changed());
 
   EXPECT_THAT(reduction.replacement(),
-              IsWord64Shl(val, IsInt32Constant(SmiShiftAmount())));
+              IsWord64Shl(IsChangeInt32ToInt64(val),
+                          IsInt32Constant(SmiShiftAmount())));
 }
 
 
 TARGET_TEST_F(ChangeLowering64Test, ChangeTaggedToFloat64) {
   STATIC_ASSERT(kSmiTag == 0);
   STATIC_ASSERT(kSmiTagSize == 1);
 
   Node* val = Parameter(0);
   Node* node = graph()->NewNode(simplified()->ChangeTaggedToFloat64(), val);
   Reduction reduction = Reduce(node);
   ASSERT_TRUE(reduction.Changed());
 
   Node* phi = reduction.replacement();
   Capture<Node*> branch, if_true;
   EXPECT_THAT(
       phi,
       IsPhi(
           IsLoad(kMachFloat64, val, IsInt32Constant(HeapNumberValueOffset()),
                  IsControlEffect(CaptureEq(&if_true))),
-          IsChangeInt32ToFloat64(IsConvertInt64ToInt32(
+          IsChangeInt32ToFloat64(IsTruncateInt64ToInt32(
               IsWord64Sar(val, IsInt32Constant(SmiShiftAmount())))),
           IsMerge(
               AllOf(CaptureEq(&if_true),
                     IsIfTrue(AllOf(
                         CaptureEq(&branch),
                         IsBranch(IsWord64And(val, IsInt32Constant(kSmiTagMask)),
                                  graph()->start())))),
               IsIfFalse(CaptureEq(&branch)))));
 }
 
 
 TARGET_TEST_F(ChangeLowering64Test, ChangeTaggedToInt32) {
   STATIC_ASSERT(kSmiTag == 0);
   STATIC_ASSERT(kSmiTagSize == 1);
 
   Node* val = Parameter(0);
   Node* node = graph()->NewNode(simplified()->ChangeTaggedToInt32(), val);
   Reduction reduction = Reduce(node);
   ASSERT_TRUE(reduction.Changed());
 
   Node* phi = reduction.replacement();
   Capture<Node*> branch, if_true;
   EXPECT_THAT(
       phi,
       IsPhi(IsChangeFloat64ToInt32(IsLoad(
                 kMachFloat64, val, IsInt32Constant(HeapNumberValueOffset()),
                 IsControlEffect(CaptureEq(&if_true)))),
-            IsConvertInt64ToInt32(
+            IsTruncateInt64ToInt32(
                 IsWord64Sar(val, IsInt32Constant(SmiShiftAmount()))),
             IsMerge(AllOf(CaptureEq(&if_true), IsIfTrue(CaptureEq(&branch))),
                     IsIfFalse(AllOf(
                         CaptureEq(&branch),
                         IsBranch(IsWord64And(val, IsInt32Constant(kSmiTagMask)),
                                  graph()->start()))))));
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8